RU2470405C2 - Actuator of electrical distributing device and electrical distributing device that contains it - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: actuator of an electrical distributing device comprises a handle (6) of manual control of a movable contact (contacts) (4) and a high-speed closing shaft (7), which comprises the first lever (13), operating in connection with an element forming a cam (14) of the handle (6), and at least one second lever (15), operating accordingly in connection with at least one limiter (16). Each limiter (16) is strongly fixed to a movable contact so that the movable contact (contacts) are retained by the second lever (levers) (15) in the start of the manual closure of the handle (6) and that the cam (14) acts at the first lever (13) after above displacement of the handle (6), in order to remove the above blocking of the second lever (levers) (15) on the movable contact (contacts) (4). Such blocking causes high-speed closure of contacts (4, 5).

EFFECT: higher reliability of disengagement kinematics, due to provision of movable contacts disengagement at a controlled distance from fixed contacts and reduced impact at it from industrial variation of part parameters participating in engagement.

6 cl, 6 dwg

Description

The present invention relates to an actuator of an electrical switchgear installed in an electrical insulating casing comprising at least one movable contact (s) supported by a contact support shaft, said movable contact (s) being designed to operate in conjunction with at least one fixed contact (s) fixed relative to the housing, a manual control handle mounted for rotation around the axis of the housing and especially moving said contact support shaft between the open position and the closed position of the contacts, and a device called a high-speed closing device, comprising a shaft called a high-speed closing shaft, said high-speed closing shaft being used to hold the movable contact (contacts) in the open position using the stored energy at the beginning of the manual closing action of the handle and by constantly moving the latter and to open the movable about the contact (s) after such a movement of the handle, so that the previously accumulated energy causes a high-speed contact closure.

The well-known patent FR 2717617 describes a device of the aforementioned type, and this device contains a high-speed locking shaft containing stops, resting directly on the movable contacts. In this device, the high-speed locking shaft is disengaged using the contact support shaft. The blocking is removed with a slight movement of the contact support shaft, so that the contacts open neither too early nor too late relative to the compression springs and relatively stationary contacts. The installation is sensitive, and any deviation in the production of parts can lead to malfunctioning.

The present invention provides a solution to these shortcomings and provides an actuator of a simple design of an electrical switchgear in which the movable contacts open at a controlled distance from the fixed contacts and for which the effects on the elements involved in the trip, such as the high-speed closing shaft and the control handle, are reduced .

To this end, the sole objective of the present invention is to provide an actuator of an electric switchgear of the aforementioned type, said device being characterized in that said high-speed locking shaft comprises a first lever working in conjunction with an element forming a cam of the handle and at least a second lever operating respectively in conjunction with at least one stop, each stop being firmly attached to the movable contact so that it is movable the contact (s) are held by the second lever (levers) at the beginning of the manual closure of the handle, while the cam, after the specified movement of the handle, acts on the first lever to remove the blocking of the second lever (levers) on the movable contact (s), and this unlocking causes a high-speed contact closure.

According to a specific embodiment, for each of the movable contacts, this device comprises a compression contact spring installed between the movable contact and the contact support shaft, and the aforementioned springs are compressed at the beginning of the closing action of the handle, while the movable contacts are held and the energy stored by the springs are thus released after this movement of the handle in order to perform a high-speed contact closure.

In accordance with a specific feature of the present invention, the movable contact (s) are mounted (mounted) respectively in the contact support or supports, wherein said support (s) are mounted in an articulated manner relative to the contact support shaft (s), and the second lever (s) is operating (operating) , respectively, in conjunction with a limiter or limiters formed respectively on the contact support (s).

According to another embodiment, this device comprises a compression contact spring for each of the aforementioned contact bearings, said spring being installed between the support and the contact support shaft, and the springs are compressed at the beginning of the closing action of the handle, while the movable contacts are held and energy stored by means of springs, thus released to perform high-speed contact closure.

In accordance with another feature, the first lever increases the angle formed relative to the second lever (levers) to 90 °.

In accordance with another feature, this device contains indicator means for detecting welding or instability of contacts, and these means are supported in part by a high-speed locking shaft and partly by a handle.

According to a specific feature, these indicator means comprise holding means belonging to a high speed locking shaft, these holding means being designed to work in conjunction with an element forming a cam of the handle, and at least one lever, called a third lever, belonging to the high speed locking shaft moreover, the specified lever (levers), called the third lever (levers), is designed to work in conjunction with a limiter or limiters, etc. o attached respectively to the movable contact (s) so that when the contacts are welded, the engagement of the third lever (s) opposite the limiter (s) formed by the movable contact (s) prevents movement of the high-speed locking shaft and therefore the handle due to the engagement of the holding means with an element forming the cam of the handle.

In accordance with another feature, the movable contact (s) are inserted (inserted) into the contact support or supports, respectively, wherein said support (s) are inserted in an articulated manner relative to the contact support shaft (s), and the third lever (s) interacts (interact), respectively , with one of the limiters, formed, respectively, on the contact support (supports).

In accordance with a specific feature, the contact support (s) are made (made) of electrical insulating material.

According to a specific feature, the aforementioned holding means comprise a lock formed at the end of (each) of the lever, called the third lever (s), and operating in conjunction with the element forming the cam of the handle.

According to another feature, the aforementioned lever, called the first lever, comprises the aforementioned holding means.

According to another feature, the aforementioned lever (s), called the second lever (s), and the lever (s), called the third lever (s), are one and the same element.

A further, additional or other object of the present invention is to provide an electrical switchgear comprising the aforementioned features, taken individually or in combination.

But other advantages and features of the present invention will become most apparent from the following description, which refers to the accompanying drawings, given for illustrative purposes only and on which:

Figure 1 is a perspective view illustrating a differential relay comprising an actuator in accordance with the present invention;

Figure 2 depicts a top view illustrating the inside of the device;

Figure 3 depicts a perspective view illustrating a contact support shaft designed to accommodate contact bearings and contact knives;

Figure 4 depicts a top view of the actuator in accordance with the present invention in the open position of the contacts;

Figure 5 depicts a view identical to the previous view, in the closed position of the contacts; and

6 is an identical view of FIGS. 4 and 5, illustrating an actuator in accordance with the present invention, equipped with a device for indicating welded contacts of the device in the welded position of the contacts.

1 and 2, you can see the differential relay D installed in the insulating casing, containing mainly terminals 1 on the side of the supply lines and terminals 2 on the load side, a shaft 3 supporting movable contacts 4, and the shaft is mounted so that it rotates in the housing between the position in which the movable contacts 4 are in contact with the stationary contacts 5 fixed relative to the housing and the position in which these movable contacts 4 are separated from these fixed contacts 5.

This device also includes an actuator C, comprising a manual control handle 6, capable of driving the contact support shaft 3 between the two above-mentioned positions, said shaft 3 being displaced to the open position of contacts 4, 5 by means of a spring (not shown).

It also contains, in a known manner, differential disconnecting means capable of opening the contacts in the event of a short circuit to ground.

This device also contains a high-speed locking shaft 7, and the high-speed locking shaft 7 is designed to hold the movable contacts in the open position of the contacts 4, 5 by the accumulated energy at the beginning of the manual closing action of the handle 6 and with a certain movement of the latter and for opening these contacts after this movement handles, wherein said stored energy causes contact closure at high speed.

For a more detailed description of the operation of such a device, you can refer to patent FR 2717617.

This high-speed locking shaft 7 is mounted in such a way that it rotates in the housing of the device, the spring 8 being installed between the shaft 7 and the housing to bias the shaft to a position in which it prevents contact closure.

As shown in FIG. 3, the contact support shaft 3 supports the contact supports 9, mounted so that they rotate inside the housings 10 located on the specified shaft 3, and these supports 9 are adapted to accommodate contact knives 11. In order to provide pressure contact between each movable contact 4 and the corresponding stationary contact 5, the compression contact spring 12 (shown in figure 2) is installed between each contact support 9 and the contact support shaft 3.

In accordance with the present invention, this high-speed locking shaft 7 comprises a first lever 13 designed to operate in conjunction with a cam 14 formed at the bottom of the handle 6 and for each of the movable contacts 4 and accordingly the movable contact bearings 9, a lever called a second lever 15 , designed to work in conjunction through its free edge with a limiter 16 located on the specified contact support 9.

The actuator also includes an indication device detecting contact welding associated with the high-speed locking shaft 7. This device contains an element in the form of a lock 17, firmly attached to the lever, called the first lever 13 of the high-speed locking shaft 7, and this element 17 is designed to work in connection with the aforementioned cam 14 of the handle. This device also contains levers, called third levers, the number of which corresponds to the number of contact bearings, and these levers are represented in this particular embodiment using the aforementioned levers, called second levers 15, and the end portion 18 of these second levers 15 is intended to work respectively in connection with contact supports 9.

The operation of the executive body in accordance with the present invention will be described below with reference to the figures.

In Fig.4, the actuator is depicted in the process of closure. The open position of the contacts corresponds to the position in which the handle is directed to the right, while the closed position of the contacts corresponds to the position in which the handle is directed to the left. At the beginning of the closing action, which corresponds to a slight movement of the handle to the left, the lever, called the first lever 13, is located inside the hole 19 formed by the cam 14 of the handle 6. During this movement of the handle 6 means not shown in the figure, but generally known as such, the contact support shaft is rotated on its axis, driving the contact supports in series around this axis. During this movement of the handle 6, the spring 8 holds the high-speed locking shaft 7, which exerts pressure on the contact bearings using levers 15. When the limiters 16 of the contact bearings collide with the levers 15 of the high-speed locking shaft, the rotation of the contact bearings around the axis of the contact support shaft is blocked, while the contact the support shaft continues to rotate on its axis. At this stage of the kinematics of the actuator, the movable contacts are separated from their respective stationary contact. During the next phase of the movement of the handle 6 to the left, the contact support shaft continues to rotate, while the movable contacts are limited in their movements in the direction of the corresponding stationary contact by means of levers 15, which exert pressure on the limiters 16 of the contact supports. The displacement of the axes of the contact bearings relative to the axis of the contact support shaft creates complex combined translational movements and rotations of the contact bearings in this phase. The supporting rotation of the contact support shaft in this phase compresses the aforementioned compression contact spring 12. When the closing movement of the handle continues, as shown in FIG. 5, the first lever 13 is rotated by the edge of the cam 14 and drives the high-speed locking shaft 7 clockwise, thereby freeing the contact bearings 9 from their engagement with the second levers 15, which weakens the movement of the movable contacts 4 in the direction of the stationary contacts 5 with high speed and almost independently of the speed of the handle obtained by releasing the energy stored by the contact springs and I.

It should be noted that in accordance with the embodiment described and depicted, the movable contacts are mounted in contact supports.

It should be noted that the displacement of the axes of the contact bearings relative to the axis of the contact support shaft allows the movable contacts to move to the position in which they are in contact with the fixed contacts.

Another embodiment is that the movable contacts are mounted directly on the contact support shaft, which in this case is movable, and the compression contact springs are installed respectively between each movable contact and the movable contact support shaft. In this case, these contact compression springs are compressed at the beginning of the rotation of the handle to a closed position, and these springs, thus, provide a high-speed movement of the movable contacts in the direction of the fixed contacts after a certain movement of the handle.

It should be noted that the lever mechanism of the high-speed locking shaft and the cam of the handle accelerates the movement of the high-speed locking shaft.

The operation of the device showing the welding of the contacts will be described below.

When the opening sequence occurs, in the case of the normal operation of the device, the high-speed locking shaft 7 moves away from the handle 6, following the rotation of the movable contacts 4, and as a result, the high-speed locking shaft is given a certain direction by means of a spring 8 acting on the contact bearings.

When a closing sequence occurs, in the housing where the device has at least two welded contacts, as the lever, called the second lever 15, presses on the stops 16 of the contact bearings 9, the rotation of the high-speed locking shaft 7 is limited. The lock 17 of the high-speed locking shaft 7 holds the handle 6 from moving to an open position. This gives an indication of the weld level of the contacts.

An effective indicating device is thus made without adding any additional details, and this indication is carried out regardless of the fact that the contact is welded.

The actuator, by virtue of the foregoing, is made by means of the present invention, in which the trip kinematics for performing a high-speed closure becomes reliable due to the fact that the movable contacts open at a controlled distance from the fixed contacts, and due to the fact that the industrial spread of the parameters of the parts involved in disengaged, reduced.

The present invention can be successfully used in a circuit breaker, a differential and non-circuit breaker, a controlled circuit breaker, a trip switch, etc.

Of course, the present invention is not limited to the embodiments described and depicted, which are given solely for purposes of example.

On the other hand, the present invention is intended to implement all the described technical equivalents of funds, as well as their combinations, if the latter are made in accordance with the invention.

Claims (6)

1. The Executive body of an electrical switchgear installed in an electrical insulating housing, containing at least one movable contact (s) supported by a shaft called a contact support shaft, wherein said movable contact (s) is designed to work in conjunction with, at least one fixed contact (s) fixed relative to the housing, a manual control handle mounted for rotation around the axis of the housing and capable of moving the indicated contact support shaft between the open position and the closed position of the contacts, a device called a high-speed closing device, comprising a shaft called a high-speed closing shaft, said high-speed closing shaft designed to hold the movable contact (contacts) in the open position with the help of the stored energy at the beginning of the manual the closing action of the handle and with a certain movement of the latter and for opening the movable contact (s) after on the movement of the handle, so that the previously accumulated energy causes a high-speed contact closure, and the specified high-speed locking shaft (7) contains a first lever (13) that works in conjunction with the element forming the cam (14) of the handle (6), and at least , a second lever (15), operating respectively in connection with at least one limiter (16), each limiter being firmly attached to the movable contact so that the movable contact (contacts) is held by the second lever (levers) (15) at the beginning of ru locking the handle (6), and the cam (14) acts on the first lever (13) after the aforementioned movement of the handle (6) to remove the aforementioned blocking of the second lever (levers) (15) on the movable contact (s), and this disengages high-speed contact closure (4, 5), characterized in that for each of the movable contacts (4) it comprises a compression contact spring (12) installed between said movable contact (4) and contact support shaft (3), and the aforementioned springs ( 12) are compressed at the beginning of the closing action p koyatki (6), while the movable contacts are held, while the energy stored by springs (12) so that this is released after moving the handle to perform a high-speed closure of the contacts (4, 5). 2. The executive body according to claim 1, characterized in that the movable contact (s) (4) is installed (installed) respectively in the contact support or supports (9), and the specified support (s) (9) is installed in an articulated manner relative to the contact support shaft (s) (3), and that the second lever (levers) (15) works (works), respectively, in conjunction with a limiter or stops (16), formed respectively on the contact support (s). 3. The executive body according to claim 2, characterized in that it comprises a compression contact spring (12) for each of the aforementioned contact bearings (9), said spring (12) being installed between said support (9) and contact support shaft (3) ), and the aforementioned springs (12) are compressed at the beginning of the closing action of the handle (6), while the movable contacts (4) are held, while the energy accumulated by the springs (12) is thus released to perform a high-speed closure contacts (4, 5). 4. The executive body according to any one of claims 1 to 3, characterized in that the first lever (13) increases the angle formed relative to the second lever (levers) (15) to 90 °. 5. The executive body according to claim 2, characterized in that the contact support (s) (9) are made (made) of electrical insulating material. 6. An electrical switchgear comprising an actuator according to any one of claims 1 to 5.

Images